由于 django 的应用程序，即智能选择，我遇到了麻烦，它尝试自行加载 jquery。我已经自己在头脑中加载 jquery，然后我正在加载与 JQuery UI 相关的东西。但是随着 smartselect 进入正文，它还会再次加载 jquery，这会导致 UI 相关内容出现问题。我不明白如果已经加载了 smartselect jquery，我该如何停止它。
以下是智能选择应用程序的 widgets.py 文件的代码。
import django
from django.conf import settings
from django.forms.widgets import Select
from django.contrib.admin.templatetags.admin_static import static
from django.core.urlresolvers import reverse
from django.utils.encoding import iri_to_uri
from django.utils.safestring import mark_safe
from django.db.models import get_model
import locale
from smart_selects.utils import unicode_sorter
if django.VERSION >= (1, 2, 0) and getattr(settings,
'USE_DJANGO_JQUERY', True):
USE_DJANGO_JQUERY = True
else:
USE_DJANGO_JQUERY = False
JQUERY_URL = getattr(settings, 'JQUERY_URL', 'http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js')
class ChainedSelect(Select):
def __init__(self, app_name, model_name, chain_field, model_field, show_all, auto_choose, manager=None, *args, **kwargs):
self.app_name = app_name
self.model_name = model_name
self.chain_field = chain_field
self.model_field = model_field
self.show_all = show_all
self.auto_choose = auto_choose
self.manager = manager
super(Select, self).__init__(*args, **kwargs)
class Media:
if USE_DJANGO_JQUERY:
js = [static('admin/%s' % i) for i in
('js/jquery.min.js', 'js/jquery.init.js')]
elif JQUERY_URL:
js = (
JQUERY_URL,
)
def render(self, name, value, attrs=None, choices=()):
if len(name.split('-')) > 1: # formset
chain_field = '-'.join(name.split('-')[:-1] + [self.chain_field])
else:
chain_field = self.chain_field
if self.show_all:
view_name = "chained_filter_all"
else:
view_name = "chained_filter"
kwargs = {'app':self.app_name, 'model':self.model_name, 'field':self.model_field, 'value':"1"}
if self.manager is not None:
kwargs.update({'manager': self.manager})
url = "/".join(reverse(view_name, kwargs=kwargs).split("/")[:-2])
if self.auto_choose:
auto_choose = 'true'
else:
auto_choose = 'false'
empty_label = iter(self.choices).next()[1] # Hacky way to getting the correct empty_label from the field instead of a hardcoded '--------'
js = """
<script type="text/javascript">
//<![CDATA[
(function($) {
function fireEvent(element,event){
if (document.createEventObject){
// dispatch for IE
var evt = document.createEventObject();
return element.fireEvent('on'+event,evt)
}
else{
// dispatch for firefox + others
var evt = document.createEvent("HTMLEvents");
evt.initEvent(event, true, true ); // event type,bubbling,cancelable
return !element.dispatchEvent(evt);
}
}
function dismissRelatedLookupPopup(win, chosenId) {
var name = windowname_to_id(win.name);
var elem = document.getElementById(name);
if (elem.className.indexOf('vManyToManyRawIdAdminField') != -1 && elem.value) {
elem.value += ',' + chosenId;
} else {
elem.value = chosenId;
}
fireEvent(elem, 'change');
win.close();
}
$(document).ready(function(){
function fill_field(val, init_value){
if (!val || val==''){
options = '<option value="">%(empty_label)s<'+'/option>';
$("#%(id)s").html(options);
$('#%(id)s option:first').attr('selected', 'selected');
$("#%(id)s").trigger('change');
return;
}
$.getJSON("%(url)s/"+val+"/", function(j){
var options = '<option value="">%(empty_label)s<'+'/option>';
for (var i = 0; i < j.length; i++) {
options += '<option value="' + j[i].value + '">' + j[i].display + '<'+'/option>';
}
var width = $("#%(id)s").outerWidth();
$("#%(id)s").html(options);
if (navigator.appVersion.indexOf("MSIE") != -1)
$("#%(id)s").width(width + 'px');
$('#%(id)s option:first').attr('selected', 'selected');
var auto_choose = %(auto_choose)s;
if(init_value){
$('#%(id)s option[value="'+ init_value +'"]').attr('selected', 'selected');
}
if(auto_choose && j.length == 1){
$('#%(id)s option[value="'+ j[0].value +'"]').attr('selected', 'selected');
}
$("#%(id)s").trigger('change');
})
}
if(!$("#id_%(chainfield)s").hasClass("chained")){
var val = $("#id_%(chainfield)s").val();
fill_field(val, "%(value)s");
}
$("#id_%(chainfield)s").change(function(){
var start_value = $("#%(id)s").val();
var val = $(this).val();
fill_field(val, start_value);
})
})
dismissAddAnotherPopup = function(win, newId, newRepr) {
oldDismissAddAnotherPopup(win, newId, newRepr);
if (windowname_to_id(win.name) == "id_%(chainfield)s") {
$("#id_%(chainfield)s").change();
}
}
var oldDismissAddAnotherPopup = dismissAddAnotherPopup;
})(jQuery || django.jQuery);
//]]>
</script>
""" % {"chainfield":chain_field, "url":url, "id":attrs['id'], 'value':value, 'auto_choose':auto_choose, 'empty_label': empty_label}
final_choices = []
if value:
item = self.queryset.filter(pk=value)[0]
try:
pk = getattr(item, self.model_field + "_id")
filter = {self.model_field:pk}
except AttributeError:
try: # maybe m2m?
pks = getattr(item, self.model_field).all().values_list('pk', flat=True)
filter = {self.model_field + "__in":pks}
except AttributeError:
try: # maybe a set?
pks = getattr(item, self.model_field + "_set").all().values_list('pk', flat=True)
filter = {self.model_field + "__in":pks}
except: # give up
filter = {}
filtered = list(get_model(self.app_name, self.model_name).objects.filter(**filter).distinct())
filtered.sort(cmp=locale.strcoll, key=lambda x:unicode_sorter(unicode(x)))
for choice in filtered:
final_choices.append((choice.pk, unicode(choice)))
if len(final_choices) > 1:
final_choices = [("", (empty_label))] + final_choices
if self.show_all:
final_choices.append(("", (empty_label)))
self.choices = list(self.choices)
self.choices.sort(cmp=locale.strcoll, key=lambda x:unicode_sorter(x[1]))
for ch in self.choices:
if not ch in final_choices:
final_choices.append(ch)
self.choices = ()
final_attrs = self.build_attrs(attrs, name=name)
if 'class' in final_attrs:
final_attrs['class'] += ' chained'
else:
final_attrs['class'] = 'chained'
output = super(ChainedSelect, self).render(name, value, final_attrs, choices=final_choices)
output += js
return mark_safe(output)
D 我知道如何检查 jquery 是否已经加载到 JS 中。但是Django如何处理它，不知道。有时我认为这些东西仍然有效，但有时不行。不明白为什么会这样。以上是我在未定义$('.datepicker').datepicker()并通过萤火虫检查后得出的结论。有时这段代码也不会引起问题。我不明白为什么。
请告诉你们是否有任何想法。请问我是否不够清楚。
谢谢
更新
这是我加载 jquery 和 jquery ui 的方式：
<!DOCTYPE html>
<html class="no-js" lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Kaasib.com</title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width">
<link rel="stylesheet" href="{{STATIC_URL}}css/style.css" />
<link rel="stylesheet" href="{{STATIC_URL}}css/ui-lightness/jquery-ui-1.8.23.custom.css" />
<script src="{{STATIC_URL}}js/libs/jquery-1.7.1.min.js"></script>
<script src="{{STATIC_URL}}js/libs/jquery-ui-1.8.23.custom.min.js "></script>
<script src="{{STATIC_URL}}js/main.js"></script>
</head>